Makelangelo-software

package com.marginallyclever.convenience.helpers;

import com.jogamp.opengl.GL2;

import java.nio.FloatBuffer;
import java.nio.IntBuffer;

/**
 * A collection of static functions to help with OpenGL.
 * @author Dan Royer
 * @since 7.30.0
 */
public class OpenGLHelper {
	static public int drawAtopEverythingStart(GL2 gl2) {
		IntBuffer depthFunc = IntBuffer.allocate(1);
		gl2.glGetIntegerv(GL2.GL_DEPTH_FUNC, depthFunc);
		gl2.glDepthFunc(GL2.GL_ALWAYS);
		return depthFunc.get();
	}
	
	static public void drawAtopEverythingEnd(GL2 gl2, int previousState) {
		gl2.glDepthFunc(previousState);
	}
	
	static public boolean disableLightingStart(GL2 gl2) {
		boolean lightWasOn = gl2.glIsEnabled(GL2.GL_LIGHTING);
		gl2.glDisable(GL2.GL_LIGHTING);
		return lightWasOn;
	}
	static public void disableLightingEnd(GL2 gl2,boolean lightWasOn) {
		if(lightWasOn) gl2.glEnable(GL2.GL_LIGHTING);
	}

	static public float setLineWidth(GL2 gl2,float newWidth) {
		FloatBuffer lineWidth = FloatBuffer.allocate(1);
		gl2.glGetFloatv(GL2.GL_LINE_WIDTH, lineWidth);
		gl2.glLineWidth(newWidth);
		return lineWidth.get(0);
	}
	
	static public double [] getCurrentColor(GL2 gl2) {
		double [] rgba = new double[4];
		gl2.glGetDoublev(GL2.GL_CURRENT_COLOR, rgba, 0);
		return rgba;
	}
}